Ed,
here are some links that may have helpful info.
tho not necessarily abt uniforms!
:-)
http://www.linux-penguin.org/achtungpanzer/articles/88mm.htm
http://www.cybermodeler.com/armor/flak88/flak88.shtml
http://www.missing-lynx.com/library/german/flak_dmourtizsen.html
i will try to check my osprey book on the 88 when i get home.
if i can find it. and if i remember!